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SARS-CoV-2 E Gene Qualitative Nucleic Acid Detection (Respiratory Specimen)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of the E gene from the virus that causes COVID-19 in your respiratory sample, such as nasal or throat swab. It helps determine if you might have an active infection.

Quick summary

["This test helps confirm COVID-19 infection by detecting a specific viral genetic marker."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
96763-8
Short code
SARS-CoV-2 E gene Resp Ql NAA+probe
Synonyms
SARS-CoV-2 E gene Resp Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

How the Test Works

The test uses a molecular method to detect genetic material (nucleic acids) from the E gene of SARS-CoV-2. A sample of your respiratory secretions is collected and analyzed to identify the virus’s genetic signature. If the virus is present, the test will return a positive result.

What to Expect Before the Test

No special preparation is needed. You may have a nasal or throat swab collected, depending on your healthcare provider’s protocol. You can eat, drink, or take medications as usual on the day of the test.

What to Expect During the Test

The test involves a quick procedure where a healthcare professional collects a sample from your nose or throat. The sample is then sent to a lab for analysis. Results are typically available within 24 hours.

What the Results Mean

A positive result indicates the presence of the E gene, suggesting you may have an active COVID-19 infection. A negative result means the virus was not detected in the sample at the time of testing. Results should be interpreted by your healthcare provider in the context of your symptoms and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

SARS-CoV-2 E Gene PCR Test

Frequently asked questions

Why is this test important?
This test is crucial for diagnosing COVID-19, especially in settings where rapid identification of active infections is needed, such as healthcare facilities, schools, or community testing programs. Early detection helps guide treatment decisions and public health measures to control the spread of the virus.
What does a positive result imply?
A positive result strongly suggests you are currently infected with SARS-CoV-2. It may prompt further testing or isolation recommendations to prevent spreading the virus to others.
Can a negative result mean I don’t have COVID-19?
Yes, a negative result means the virus was not detected in the sample at the time of testing. However, it’s possible you could have tested negative but later develop symptoms. If you have symptoms of COVID-19, you may need to retest or follow public health guidance for additional testing.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy